For some strange reason, in the hollow of a tree outside Konohagakure village, there is a path leading to a station to a place called Hogwarts. Tobirama Senju was sent to Hogwarts for a mission to greet and observe here under Headmaster's agreement.

In here, Tobirama can saw students in a robe and using magic, not jutsu. His eyes wander around while walking along the corridor.

Students are friendly, also professors and headmaster. Maybe staying in Hogwarts for a while not a bad idea...